I think the point is that he's the CEO of both companies, and some of his wild claims were about building, launching and recovering rockets. Are we supposed to ignore SpaceX and just look at Tesla when considering Musk? You may consider that being a showman, and it was, but it was also showing his ability to delivery on some of his promises of rocket reusability.

Anyone basing their opinion of Musk purely on his role and publicity from one of these companies when they are both so very public is the height of confirmation bias, in either direction.